diff --git a/Changelog.txt b/Changelog.txt
index 336457a..385f345 100644
--- a/Changelog.txt
+++ b/Changelog.txt
@@ -1,3 +1,6 @@
+* 2017-10-31
+	- Updated paper ``Games Without Frontiers: Investigating Video Games as a Covert Channel''
+
 * 2017-10-30
 	- Updated paper ``StegoTorus: A Camouflage Proxy for the Tor Anonymity System''
 	- Added paper ``On the risks of serving whenever you surf: Vulnerabilities in Tor's blocking resistance design''
diff --git a/header.tpl b/header.tpl
index 7156846..81bba2f 100644
--- a/header.tpl
+++ b/header.tpl
@@ -83,7 +83,7 @@
       (<a href="author_reverse.html">reverse</a>) <a href="author.html">author</a> <br />
       Feedback: <a href="mailto:phw@nymity.ch">phw@nymity.ch</a> (<a
       href="https://nymity.ch/openpgp_public_key.txt">OpenPGP</a>) <br />
-      Last updated: <a href="Changelog.txt">2017-10-30</a> <br />
+      Last updated: <a href="Changelog.txt">2017-10-31</a> <br />
       Onion site: <a href="http://3wcwjjnuvjyazeza.onion">3wcwjjnuvjyazeza.onion</a> <br />
       Code: <a href="https://github.com/NullHypothesis/censorbib">GitHub</a>
     </div>
diff --git a/references.bib b/references.bib
index 358b488..1758b1e 100644
--- a/references.bib
+++ b/references.bib
@@ -349,7 +349,7 @@
 	booktitle = {European Symposium on Security \& Privacy},
 	publisher = {IEEE},
 	year = {2016},
-	url = {http://www3.cs.stonybrook.edu/~phillipa/papers/castle.pdf},
+	url = {https://people.cs.umass.edu/~phillipa/papers/castle.pdf},
 }
 
 @inproceedings{Ellard2015a,